You should be able to replace the blade in your knife.
Grab it and pull it out, align the blades and insert the new one. the engine compartment fuse panel will have a diagram of which one it is.
no it is not a physical change because folding a piece of paper does not chemicaly change it.
Folding a paper does not form new substances.
change in Total Utility over change in quantity (of the next unit)
Physical since you aren't actually changing whatever you are cutting or folding into something else.
Yes it's a physical change. No new substance is formed,
It is a physical change as the paper is still paper after you fold it.
It is a physical change as the paper is still paper after you fold it.
Physical.
How do you Change Windshield Wiper Blades on a 2004 Chevrolet Trail Blazer?
Not necessarily when to change; but when to sharpen mower blades: The easiest way to know is by observing the way the grass is cut. A sharp blade will make a "clean cut" on the grass blades, whereas a dull blade will "tear" the grass and leave a "ragged" appearance. As far as when to change out the blades, there is no set time interval, you just have to visually evaluate the condition of the blade (bent, badly worn, warped, etc.) to determine when to change. If your mower uses 2 blades, it would be wise to change both blades at the same time.
It is a physical change as the paper is still paper after you fold it.